- f.fields_for :page do |pf|
  %tr
    %th.label
      %label{:for=>"shop_category[layout]"}= t('custom_layout')
    %td.field
      = pf.collection_select :layout_id, Layout.all, :id, :name
%tr
  %th.label
    %label{:for=>"shop_category[product_layout]"}= t('custom_product_layout')
  %td.field
    = f.collection_select :product_layout_id, Layout.all, :id, :name